segmented motor lamination cores in NEVs

Why Do New Energy Vehicles Use Segmented Motor Lamination Cores

In the realm of New Energy Vehicles (NEVs), the selection of motor components holds critical significance, particularly the motor lamination cores. These cores, often segmented for enhanced efficiency, are pivotal in optimizing the performance and sustainability of NEV motors. This article aims to demystify the rationale behind the prevalent use of segmented motor lamination cores in NEVs, offering insights for enthusiasts and professionals alike delving into the intricacies of NEV motor design.

Understanding Motor Lamination Cores

self bonding motor lamination in NEVs

Motor lamination cores serve as the backbone of NEV motors, providing structural integrity while facilitating efficient energy conversion.

These cores, encompassing both stator and rotor components, form the foundational structure upon which motor efficiency hinges. Composed of thin layers of electrical steel, they facilitate the conversion of electrical energy into mechanical motion with minimal energy losses.

By optimizing magnetic flux distribution and reducing eddy current losses, segmented motor lamination cores ensure the seamless operation of NEV motors.

Challenges in NEV Motor Design

The quest for high efficiency and performance in NEV motors presents unique challenges, reflecting the demanding requirements of efficiency, heat dissipation, and compactness. NEV motors must deliver high performance while navigating constraints such as weight and size limitations.

Effective heat dissipation becomes paramount, especially under heavy loads, necessitating innovative solutions to prevent overheating and maintain optimal performance. Additionally, minimizing energy losses, particularly eddy currents, poses a significant challenge in achieving maximum efficiency.

Addressing these challenges requires meticulous design considerations and the exploration of alternative solutions, such as segmented stator lamination cores, to overcome the complexities inherent in NEV motor design.

Advantages of Segmented Motor Lamination Cores

Segmented motor lamination cores offer a plethora of advantages over traditional designs, making them a preferred choice in NEV motor applications:

advantages of segmented laminations

Enhanced Efficiency

Segmented cores minimize energy losses, such as eddy currents, by optimizing magnetic flux distribution, resulting in improved overall motor efficiency.

Superior Heat Dissipation

The segmented structure allows for better heat dissipation, crucial for maintaining optimal motor performance, particularly under heavy loads or high-speed operations.

Reduced Core Losses

By minimizing core losses, segmented cores contribute to energy savings, extending the driving range of NEVs and enhancing their overall energy efficiency.

Modular Design

The segmented nature of these cores enables easier assembly and disassembly, facilitating maintenance and repair processes, thereby reducing downtime and costs.

Weight and Size Optimization

Segmented cores offer a compact and lightweight design, meeting the stringent weight and size requirements of NEV applications without compromising performance.

Improved Power Density

The optimized magnetic flux distribution and reduced losses result in higher power density, enabling NEV motors to deliver more power in a smaller package.

Compatibility with High-Speed Operation

Segmented motor cores excel in high-speed operation scenarios, ensuring stable and efficient performance even under demanding driving conditions.

Technical Aspects of Segmented Motor Lamination Stacks

technology of segmented stator laminations

As a professional motor core lamination manufacturer based in China, our technical aspects of segmented lamination cores encompass various processes, including high-speed stamping, wire cutting, and assembly. Progressive stamping involves the precision cutting of thin layers of electrical steel to create individual segments, ensuring uniformity and accuracy in dimensions. 

Wire EDM techniques are utilized to create intricate shapes and patterns within the segments, optimizing magnetic flux distribution and reducing eddy current losses. This process is suitable for automotive lamination prototype production.

Assembly of segmented cores requires meticulous alignment and dovetail slots interlocking, welding, or bonding techniques to ensure structural integrity and maximize efficiency.

Future Trends and Innovations

As the NEV industry continues to evolve, so too does motor technology. Emerging trends and innovations in segmented motor lamination cores, such as the integration of sustainable materials and advancements in manufacturing processes, pave the way for further efficiency improvements and sustainability enhancements in NEV motors.


In conclusion, segmented motor lamination cores emerge as indispensable components in the pursuit of efficient and sustainable NEV motors. By addressing key challenges and offering substantial advantages, they play a pivotal role in shaping the future of transportation towards a greener, more sustainable paradigm.


How do segmented motor lamination cores enhance NEV motor efficiency?

Segmented cores minimize energy losses, such as eddy currents, and optimize magnetic flux distribution, resulting in improved overall motor efficiency.

What materials are used in segmented motor lamination cores?

Segmented cores are typically made of silicon steel, chosen for its magnetic properties and suitability for motor applications.

In addition, amorphous alloy materials are also being used in an increasing number of electric vehicles’ motor stator lamination stacks.

Can segmented motor laminates be customized for specific NEV applications?

Yes, segmented motor iron cores can be customized according to different design requirements and are suitable for various types of electric vehicles, including hybrid vehicles, pure electric vehicles, and fuel cell vehicles, to meet the performance requirements of different models.

Are there any limitations or drawbacks associated with segmented motor lamination cores?

While segmented stator cores offer significant advantages, they do come with some limitations. One drawback is the increased complexity and cost associated with their manufacturing process compared to traditional motor cores. 

Additionally, the segmented structure may introduce potential points of weakness or mechanical failure if not properly designed or assembled.

However, advancements in technology and manufacturing techniques continue to address these challenges, making segmented cores an increasingly viable option for enhancing efficiency and performance in NEV motors.

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